<!doctype html>
<!--
@license
Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<html>
<head>
  <meta charset="utf-8">
  <script src="../../../webcomponentsjs/webcomponents-lite.js"></script>
  <script src="../../../web-component-tester/browser.js"></script>
  <link rel="import" href="../../polymer.html">
</head>
<body>

<script>

  HTMLImports.whenReady(function() {
    Polymer({is: 'my-element'});
  });

  setup(function() {
    window.el1 = document.createElement('my-element');
    document.body.appendChild(window.el1);
    window.el2 = document.createElement('my-element');
    window.el1.appendChild(window.el2);
  });

  teardown(function() {
    document.body.removeChild(window.el1);
    delete window.el1;
    delete window.el2;
  });

  suite('CSS utilities', function() {

    test('toggleClass', function() {

      window.el1.toggleClass('foo-class', true);
      assert(window.el1.classList.contains('foo-class'));
      window.el1.toggleClass('foo-class', false);
      assert(!window.el1.classList.contains('foo-class'));
      window.el1.toggleClass('foo-class');
      assert(window.el1.classList.contains('foo-class'));
      window.el1.toggleClass('foo-class');
      assert(!window.el1.classList.contains('foo-class'));

      window.el1.toggleClass('foo-class', true, window.el2);
      assert(window.el2.classList.contains('foo-class'));
      window.el1.toggleClass('foo-class', false, window.el2);
      assert(!window.el2.classList.contains('foo-class'));
    });

  });

  suite('debounce', function() {

    test('debounce (no-wait)', function(done) {

      var called = 0;
      var cb = function() {
        called++;
      };

      assert(window.el1.isDebouncerActive('foo') === false);
      window.el1.debounce('foo', cb);
      window.el1.debounce('foo', cb);
      window.el1.debounce('foo', cb);
      assert(window.el1.isDebouncerActive('foo') === true);

      setTimeout(function() {
        assert.equal(called, 1, 'debounce should be called exactly once');
        done();
      });

    });

    test('debounce (wait)', function(done) {

      var called = 0;
      var cb = function() {
        called++;
      };

      window.el1.debounce('foo', cb);
      window.el1.debounce('foo', cb, 50);
      window.el1.debounce('foo', cb, 100);

      setTimeout(function() {
        assert.equal(called, 0, 'callback is not called yet');
      }, 50);

      setTimeout(function() {
        assert.equal(called, 1, 'callback was called exactly once');
        done();
      }, 200);

    });

    test('debounce flushing', function(done) {

      var called = 0;
      var cb = function() {
        called++;
      };

      window.el1.debounce('foo', cb);
      window.el1.flushDebouncer('foo');
      window.el1.debounce('foo', cb);

      setTimeout(function() {
        assert.equal(called, 2, 'debounce should be called twice');
        done();
      }, 100);

    });

    test('debounce state', function(done) {

      window.el1.debounce('foo', function() {
        assert.equal(window.el1.isDebouncerActive('foo'), false, 'debouncer is inactive after resolution');
        done();
      });

      assert.equal(window.el1.isDebouncerActive('foo'), true, 'debouncer is active immediately after triggering');

    });

    test('debounce cancelling', function(done) {

      var triggered = false;

      window.el1.debounce('foo', function() {
        triggered = true;
      });
      window.el1.cancelDebouncer('foo');
      assert.equal(window.el1.isDebouncerActive('foo'), false, 'debouncer is inactive after cancelling');

      setTimeout(function() {
        assert.equal(triggered, false, 'debounce never fired');
        done();
      }, 100);

    });

    test('duplicate debouncer assignment (no-wait)', function(done) {

      var a, b;

      window.el1.debounce('foo', function() {
        a = 'foo';
      });
      window.el1.debounce('foo', function() {
        b = 'bar';
      });

      setTimeout(function() {
        assert.equal(a, undefined, 'first debouncer was never fired');
        assert.equal(b, 'bar', 'only the second debouncer callback was executed');
        done();
      });

    });

    test('duplicate debouncer assignment (wait)', function(done) {

      var a, b, delay = 50;

      window.el1.debounce('foo', function() {
        a = 'foo';
      }, delay);
      window.el1.debounce('foo', function() {
        b = 'bar';
      }, delay);

      setTimeout(function() {
        assert.equal(a, undefined, 'first debouncer was never fired');
        assert.equal(b, 'bar', 'only the second debouncer callback was executed');
        done();
      }, (delay+50));

    });

  });

</script>
</body>
</html>
